Reinhard is the founder of the GRB Academy and the Rays program.  Prior to leading the way in amateur baseball in Wisconsin, Reinhard played for the Chicago Cubs and the Tampa Bay Rays professionally for 6 seasons.  He also was voted the 2005 D3 National Baseball Pitcher of the Year unanimously, while leading the UW-Whitewater Warhawks to their 1st Baseball National Championship in school history.  Reinhard grew up in Marinette, WI.  Under his direction, the Rays program has become one of the most desirable programs to play for in the Midwest.  The Rays boast impressive numbers under Reinhard’s guidance, with over 125 college players coming from the Rays program, spread out across the country playing at the next level.  Of those 125 players, 88 went to scholarship schools.  Two players have been drafted under Reinhard (Dan Jansen and Jeren Kendall).  Reinhard does pitching instruction at the facility, and manages the day to day operations of the Academy and the Rays.  He also manages the 17U team and the college recruiting for the program.


Max Cordio is a partner at the GRB Academy, and has been a key figure in developing the Academy and the Rays program since day one.  Cordio, a Whitewater native, chose to stay home for his college career and played for the hometown Warhawks.  While there, Cordio made an appearance in the NCAA D3 World Series.  Playing multiple positions, Cordio is well rounded in the game of baseball.  Cordio has led the Rays offensive attack for years, and is one of the most sought after hitting instructors in the Midwest.  In addition to his training at the Academy, Cordio coaches 3rd base and manages game play of the 17U team.  Cordio has had 32 D1 hitters come from his guidance, including 4 State Player of the Year awards in Wisconsin.


Stewart joined the GRB staff in May of 2015.  Prior to coming to GRB, Stewart spent several years at the D1 level as a player and coach.  Stewart was a 4 year starter at Western Illinois.  Following his collegiate career, Stewart played two seasons of professional baseball in the Frontier League for the River City Rascals in O’Fallon, Missouri.  Following his playing days, Stewart returned to the D1 level to coach back at his alma mater.  Back at Western Illinois, Stewart was responsible for the catchers, and developing offensive strategy.  Both of these make Stewart a great addition to GRB to train the catching staff, and work directly with hitters.  Stewart trains catchers and hitters in private instruction.  He also has knowledge in pitching, as well as strength and conditioning.


Ransom returned to teach and work at the program that he came from, becoming the first Rays player to return to work for the program after his playing days.  Ransom, a North Dakota recruit in 2010,  was the first Rays player to sign to play D1 baseball.  Ransom left the Rays program holding the wins record in a season, and still is the holder of this record currently.  A true competitor on the mound, Ransom has developed the Academy’s velocity program, and takes the lead on several of the pitching development programs.  Ransom also does some hitting lessons, and speed and strength training.


Burmeister joins the GRB staff after coaching the Madison Mallards in 2015 and 2016 as their hitting coach. Prior to the Mallards, Burmeister coached at D2 Minnesota-Duluth (2016) and D3 power UW-LaCrosse (2014-15).  Burmeister was a standout player at both Madison College (JUCO) and UW-LaCrosse from 2010-13.  After his playing career finished, Burmeister dove right into college coaching at UW-L where he was a part of the 2015 National Runner Up Team.  At Minnesota-Duluth, Burmeister was the head hitting coach of a team that was 3rd in the country as a team for batting average, and 2nd in the country in both home runs and slugging percentage.  Trevor will join into the GRB staff in training hitting and defense.  Burmeister will also be the head assistant at Madison College during certain times of the year.


Stauber, a De Pere, WI native, brought his college coaching and playing background to GRB in 2013.  Prior to GRB, Stauber played college baseball for St. Norbert’s.  As a player, Stauber served as team captain in 2007 and 2008, winning the Midwest Conference title both years with a combined 51-22 record.  Stabber hit .381 in 2008.   Post playing days, Stauber has had coaching stints at St. Norbert’s, Lawrence, and Central College (IA).  Stauber has also coached for the Green Bay Bullfrogs of the Northwoods League from 2009-2011.  The Bullfrogs compiled a 98-77 record over his time in Green Bay, earning a playoff berth in 2011.  Stauber has worked with over 30 MLB draft picks in his time. Currently Stauber is the Director of Marketing and Communications at GRB Academy.


Adam Kilp comes to the GRB program from the Northeastern Wisconsin/Green Bay area. Adam played college baseball at St Norbert College and shortly after graduating began a career in teaching and coaching. He has been an assistant coach at Green Bay Notre Dame Academy, St Norbert College, and Ashwaubenon High School. In 2013 he became the head coach at Ashwaubenon High School. After moving to the Madison area in 2017, Coach Kilp joined the GRB program and has been coaching the 17U yellow team for the past three summers. He is also available for personal instruction including hitting, infield, and outfield play at the Madison location.


Hayden Fenner has been coaching with GRB Academy since the Fall of 2013. Fenner joined the full-time GRB Academy staff in August of 2019. A Ripon native, Fenner played 4 years of varsity baseball, starting all but one game behind the plate. He was a key piece in Ripon’s 2011 State Championship team. Fenner played with the GRB Rays under Greg Reinhard and Max Cordio from 2012-2013. After HS, Fenner played collegiately at the University of Wisconsin – Whitewater where he was fortunate to be a part of the 2014 National Champion Warhawks. Hayden is available for personal instruction including hitting, catching, and infield play at the Madison location.


Bunnell joins the GRB staff in September of 2019 after playing in the program from 2007-2015. A Stoughton native, Bunnell was drafted by the Atlanta Braves in the 40th round of the 2019 Major League Baseball Draft, making him the first ever draft pick from Stoughton. The Indiana University graduate finished his collegiate career at Indiana University where he was a pivotal piece in their 2019 B1G Conference Championship season playing both second and third base. Prior to Indiana, Bunnell played seasons at Madison College and Kansas State University. Bunnell played in the Northwoods League from 2016-2018 for both the Madison Mallards and Rockford Rivets. Bunnell joins the GRB staff to offer personal instruction for hitting and infield play at the Madison location.


Jake Kolashinski will serve as the Director of Operations at the GRB-Milwaukee location. Kolasinski most recently served as the Youth Coordinator at Hitters Baseball and comes to GRB after a stellar playing career at UW-Parkside, earning first-team All-GLVC honors in 2015. A three-time Player of the Year in the Midwest Classic Conference during his time at Brookfield Academy, Kolasinski was a three-time captain at Parkside. Kolasinski majored in Sports Management at Parkside and played parts of two seasons with the Lakeshore Chinooks of the Northwoods League.


Waukesha native Tyler Frohwirth has been added to the GRB-Milwaukee staff. Frohwirth, a Brookfield Academy graduate, played collegiately at Minnesota State-Mankato before being selected by the Philadelphia Phillies in the 31st round of the 2016 MLB Draft. Pitching parts of three seasons with the Phillies and Orioles organizations, Frohwirth compiled a career 3.27 ERA professionally, striking out 37 in 44 innings. Frohwirth also pitched professionally with the Chicago Dogs and Normal Cornbelters.


Eric Semmelhack joins GRB to lead the charge of the High School program, along with focusing on throwing and pitching development for GRB-Milwaukee.  Semmelhack previously was the General Manager of Hitters Baseball Academy of Racine, where he also was in charge of the 16U team. Eric’s relationships with many of those in college baseball will be instrumental in helping players and families with recruiting.  An Oak Creek, WI native, Semmelhack starred at UW-Milwaukee where he led the Horizon League in strikeouts as a junior. Post college, Semmelhack was rewarded for his efforts by being a 12th round selection of the Milwaukee Brewers. Post playing days, Semmelhack has coached at Oak Creek and Marquette HS, along with being the pitching coach at MSOE for 2 years.


Serio comes to GRB-Milwaukee after a collegiate career that had him finish at Division I UW-Milwaukee.  Originally from Whitnall High School, Serio started his playing career at DII UW-Parkside, before transferring to Milwaukee.  Serio also played two years in the Northwoods League, and was twice selected for the prestigious Major League Dreams Showcase in 2015 and 2018.  Serio will bring both pitching and hitting experience to GRB daily as part of the full time staff for GRB-MKE.